In problem 3, the queue did not completely clear after 30 second or after green signal was on. It took some time to discharge all the queue (queue discharge time). Estimate the following if flow during the green light is 2700 vpm with a speed of 50 mph.

3. A line of traffic moving at a speed of 30 mph and a concentration of 50 vph stopped for 30 sec at the red light. Calculate the following. (20)

Velocity of the stopping wave.
Length of line of car stopped during 30 seconds of red.
What is the type of wave formed?
Number of cars stopped during 30 second of red. Assume a jam concentration of 250 vpm.)